package com.wuzihao.reggie.controller;

import com.wuzihao.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

@Slf4j
@RestController
@RequestMapping("/common")
public class CommonController {

    @Value("${reggie.path}")
    private String basePath;

    @PostMapping("/upload")
    public R upload(MultipartFile file){
        String originalFilename = file.getOriginalFilename();
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));//.jpg

        String str = UUID.randomUUID().toString();
        String fileName = str + suffix;

        File dir = new File(basePath);

        if(!dir.exists()){
            dir.mkdir();
        }
        //转存文件
        try{
            file.transferTo(new File(basePath + fileName));
        }catch (IOException e){
            e.printStackTrace();
        }

        return R.success(fileName);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response){
       try{
           //创建输入流读取文件
           FileInputStream fileInputStream = new FileInputStream(new File(basePath + name));
           //创建输出流
           ServletOutputStream outputStream = response.getOutputStream();

           response.setContentType("image/jpeg");
           byte[] bytes = new byte[1024];
           int len = 0;
           //文件不为空则一直写文件
           while((len = fileInputStream.read(bytes)) != -1){
               outputStream.write(bytes,0,len);
               outputStream.flush();
           }
           //关闭文件流
           fileInputStream.close();
           outputStream.close();
       }catch (IOException ex){
           ex.printStackTrace();
       }
    }
}
